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Seattle Heatwave: Warm Weekend Ahead!
5 May
Summary
- Temperatures will climb into the 70s to low 80s Sunday and Monday.
- Sea-Tac could break its Sunday record high of 77 degrees.
- Boating season opens Saturday, but water remains dangerously cold.

Seattle residents can expect a warm stretch this weekend, with temperatures projected to reach the 70s and low 80s by Sunday and Monday. Sea-Tac could potentially break its Sunday record high of 77 degrees, possibly reaching 80 degrees for the first time since September. This significant temperature increase is attributed to a strengthening ridge of high pressure.
Despite the rising air temperatures, the opening day of boating season on Saturday will feature dangerously cold water, remaining in the 40s and 50s. This poses a risk of cold-water shock. Conditions are forecasted to remain dry into next week before a slight cooling trend, with temperatures returning to the mid-60s to low 70s as onshore winds pick up. Seattle typically sees nearly two inches of rain in May, with daylight increasing throughout the month.